Fuel-burning apparatus.



H. B. BOZARD. FUEL BURNING APPARATUS.

, APPLICATION FILED MAR-11.1915.

Pa tent-eii Sept. 28, 1915.

W A W d #0 M Q .v 6 a t it er F Q HARRISUN B. BOZARD, (51 GRGSSE,

w ll.

VJEGGLEESI FUEL-BURNIHG- figilia ifitiii.

latenteci sept. 28,

Application filed Earch 3.1 1915 Serial Ho. 13 67%.

T all whom it may concern j Be it known that I, Emerson 18. Boston), acitizen of the United States, and resident of La Crosse, in the countyof Crosse, and in the State of Wisconsin, have invented a certain newand useful Improvement in Fuel-Burning Apparatus, and do hereby declarethat the following is a full, clear, and exact description thereof.

The object of my invention is to provide means for fuel. burningapparatus (by which I include stoves, furnaces and other heat producingdevices, Whatever their construction and use may be) whereby greateconomy in the fuel used may be secured by the iiti zation to a highdegree of all of the coinhnstible elements in the fuel for thegeneration of heat, and besides this general and very important object,I have in view the pr0- duction of a construction which will he sins pieand inexpensive, and have other advantages-which will be evident tothose skilled in the art when they understand from the furtherdisclosure herein the nature of my invention.

In the. accompanying drawings Figure 1 is, a vertical section of enoughof an ordinary water heater to illustrate one embodiment, or adaptationof my invention; Fig. 2 a front elevation thereof; Fig. 3 a front endelevation of certain of the parts; Fig. 1 a detail view in perspectiveof the form of battle plate employed in the structure shown in Fig. 1.

Referring to the drawings in connection with the detailed description ofthe construction illustrated therein l0 designates a Water boileradapted for burning coal and provided with a fuel-supporting grate and ahopper, or feed pouch 12 projecting forwardly from the front of thecoiier its outer end provided with a i iinejed door 13. Within the feedpouch, and forming in effect an elevated false bottom the; shut c5 14:consisting of a plate that from the outer end of the pouch a clinedownward and forward, and. i ner end has a vertical flange 15 that $3.down to bottom of the po c 4 its inner end and forms in elm-c a vsrtiextension of the fire pot, creases the fuel hold pet, The outer ed e ifi will" or diaphragm o a cement to the inner edges of the door 18, s toform i the door a chamber 17, 0 make the door 13 a hollow body, the te16 extending not quite to the bottom of the door, so a passage 18 fromwithin door into the pouch below the shot all 14-, provided. The door1?, preferably near i s top, is provided with one, or more air holes 19so that air from the outside may pass into the chamber 1'2 in the doorand from. the member 17 through the pas sage 18 into the space withinthe pouch beneath the shut oh 14. Within the space be tween the shutoil? fi land pouch, is battle plate 20 which extends from the door 13(downward and inward at. a h' i line, and at its rear end has a do range21 spaced in fr u t flange 15 of the shut 0%, reaching downward only m5part 0" the ay so as to provide an opening 2 leading from. the space 23below the baffle plate 20 into the vertical space 24 between the shutoff flange 15 and the battle flange 21,

and thence into the space 25 between the battle plate 20 and thehorizontally extending portion of the shut off lie, above the same. itwill thus be seen that air entering the hole or holes 39 in the doorwill pass downward through the chamber 1? therein in contact with theheated hack wall 16 of the doc i thence backward through the passage Lit into the vertically extending passage 2%, a S thence, forward throughthe passage p the narrow space between front edge of the shut off l iand the back all 16 of the into the ponch having in its circuitous withthe heated surhid of t e air is i of lieatdome, or nee, Without v 1Besicies this, cl eed l pouch, it coasts ediment to he which is securedby bolts 5.5

the bottom of the finally emerge through so gases to a. high M' Li u up.too ill the shut oil,

pol-lion ll ll t ready placing of fuel into the the box, and, indeed byhe vertical extension of the fire box, which is produced by the verticalflange the shut oil, the capacity of the lire pot for -fuel is actuallyincreased and increased by raising of the level of the fuel Within thepot and bringing the zone of combustion closer to the boiler dome, orother part of the heating apparatus, above the tire to which. heat is tobe applied. No bottom draft, that adrailit upward through the grate isrequired, because 01. the high degree of combustion "which I obtain bymy means of preheating the air so that the layer of ashes below theplane designated by the letterA- in l 1 may be retained to check thedraft from oelow. B3" use of my shut off 14%, the coal. in the apparatusshown in Fig. 1 of "he drawing may be piled as high as the level B,whereas without rny invention the coal should. not be placed higher thanthe level (it ill e mixing oi the preheated air with the iron the lirebegi in the rear part of the pouch. 1'2 and in the upper portion of theifOlIllHIE-ltifl'il zone With the result that theinixingg tilllw i placeat the point lllOSl} etiica- :ious producing a large flame of hightonlpiubatare. The ballie platelO is secured in position b iuitahlebolts, and such provision tor adpistinent to regulate the properspacing; hereof to provide the air passages in provu ;d for by suitableslots through which th attaching; bolts pass. Preferably to provide theair space between the front edge of the shut-oil" l4: and the inner Wallit ol door, the inner wall 16 is provided with a transversely extendinggroove or channel :17 mintig uous to the front edge of oil it I i. i

the shut :liat in space between the l. u o l-l narrows or conlra n ardor 1 the direction in which the :zli' is lr tvolin and that the passagearoluid the forward edge oi the plate 14: is root-I; (atoll. The resultolf this is that the air its passage forward through is rhe'zhr-d in theit. and, hence, is kept in contact .h heated. vertical flange 15 of andthe hm-izontally extending or-moi so that. by the time the tltllYi li"or mixing with the fuel in in a very highly heated condition. 3 isprovided with the usual to and within the spacecovcred l limnpor a holemay be provided u the door to serve as a peep hole to enable 1 ofcombustion within the 'l'urnzu'c rd. in such matters as this and thellil sl des, or daml rs to control the openings, it is to ill!understood \'arii=1 roasll'uotion and arrangement may at: to Withoutdeparture 'l'rolu my ina d s have before indicated the :ro ntioal asl'orth in my lilld broadest claims not to be restricted to anyparticular form ot cons ruction ol 'l'uel buriu ing apparatus whereinair supplied in a heated coinlition tor mixing; with the fuel gas.

Careful. and long conducted. tests of apparatuses embodying my inventionhave shown a verygreat saving; in fuel and the prod uction of a moreeven and steadier lire.

Having thus described my invention what I claim \is- 1. A fuel burningap aaratus having a chambered outer wall formed of spactal up- Wardlyand downwardly extending outer and inner plates, the outer plate havingan opening through which coninnniiration lietween the chamber and. theexternal air may be had, and an opening being provided from said.chamber at one thereol'. and. a devious passage extending 'l roni said ojiening; inward toward the ooinluls'i'iou. chamber and then outwardWhose exit is ciuitigguous to said inner plate and is torniocl betweenthe front edge oil a inn'iaontally extending: plate and said inner plateruluirchy' air entering said Outer "all chamber passes vertically l. 2tween the plates thereof and.

tlunice horizontally in opposite directions and is linal ly dischargedto the combustion none oi? the apparatus.

2, A fuel. burning apparatus cinuprisiuu a lire pot s fuel teediiopening] leadiu into said tire pot and a d r'ious air pas'apje lead ingfrom. outside the api'utratus oout' ruor said feed opening and into thecoinlnistion zone, the terminal portion of said passage extendinghorizontally outward and the exit therefrom being at its outer end, saiddevious passage being :lormed by spaced plates in the lower part oi. thefeed opening, said plates being placed one above another, the terminal.portion oi? the passage lining? in neath the ut perinWl plate andeatcniliini; l'ol Wardly away iron: the lire pot and lcadilug; to anexit opening at the outer i-ud. oi sin-i1 terminal portion.

3. A fuel burning apparatus conspris," lire pot, a 'lucl feeding openingleading; into said lire pot and a devious air passage leading); fromoutside the apparatus voulipfuous to said l ced opening; and into thecombustion Zone, the tcrmi at poi-lion oi said past-Inge extendinghorizontally outward and the (Kill tllorejt rinu being at its outer endsaid dovious passage being; formed by spared plates in the lower partoil the feed opt-nine; said plates at their inner end baring" a down-"wardly ploieotine; llaugrc, one of which lorms' a vertical prolongationoithe lire put t. A fuel burning apparatus comprising? a, lire pot, a.loud pouch leading into the lire pot having its uter and closed by aliant llll'ttll door liari poor and outer walls. the chandler villain.use ilour being in i-oruinuni nation will; the external air and withlilo in Miami terior of the pouch, and spaced plates in the lower partof the pouch, one above the other, have hereunt .5 discharge opening forheated air that delivers the air abo the feed pouch.

. Witnesses: ve the uppermost plate into In testimony 0 set my hand.

HARRISON B. BUZARD.

F 1,PHILIP A. EEnERsoN,

ART J.

BRUHA.

that I claim the foregoing I

